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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (9): 929-932. 上一篇    下一篇

研究论文

内消旋和外消旋2,3-二氰基-2,3-二苯基丁二酸二乙酯对苯乙烯聚合反应的影响

金景;刘捷;黄红军;刘有成;杨第伦   

  1. 兰州大学化学系;兰州大学应用有机国家重点实验室;中山市应用化学研究所
  • 发布日期:1995-09-15

Influence of the meso-and dl-diethyl-2,3-dicyano-2,3-diphenylsuccinate on styrene polymerization

JIN JING;LIU JIE;HUANG HONGJUN;LIU YOUCHENG;YANG DILUN   

  • Published:1995-09-15

PDF

362

被引次数

10

测定了题目化合物立体异构体在80℃和90℃引发苯乙烯的自由基聚合反应。在相同条件下, 较活泼的meso-体为引发剂时, 聚合速率大, 产物分子量小; 而较稳定的dl-体则聚合速率小, 产物分子量大。且在所有反应条件下分子量均随反应时间增长。研究结果认为它们不同的聚合性能主要与异构体热分解速率对聚合动力学的影响有关。

关键词: 反应动力学, 苯乙烯, 聚合, 异构体, 消旋, 自由基, 二氰基二苯基丁二酸二乙酯

That the radical polymerization of Styrene is initiated by meso-and dl-diethyl 2,3-dicyano-2,3-diphenyl succinate at the temperature 80℃ and 90℃ have been determined. Under the same condition, the reactive meso isomer as a initiator, the polymerization rate is faster than dl isomer, but the weight of polystyrene is lower than dl's. However, the molecular weight of products increase with reaction time in all case. The results indicate that the different polymerization properties of the two isomers for vinyl is related to their thermal stability on the polymrization kinetics.

Key words: REACTION KINETICS, STYRENE, POLYMERIZATION, ISOMER, RACEMIZATION, FREE RADICALS

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